See Kim Kardashian's Sexy Halloween Costume: Poison Ivy!

For Saturday night's Midori Green Halloween bash at LAVO in NYC, the reality star, 31, went all out as Poison Ivy, the sexy, poisonous Batman villain made famous by Uma Thurman in 1997's Batman & Robin.

"The party is obviously with Midori," the liquor's spokeswoman told Us Weekly. "So I wanted to wear something green and I thought, what really is there to wear green? There's Tinkerbell or a mermaid -- and I wanted to be Poison Ivy. I like the red hair idea.